# How will i fix "build.command" failed error for my express application while publishing on netlify **URL:** \ **Category:** Support\ **Tags:** building, deployment\ **Created:** [September 16, 2020, 7:27am UTC](https://answers.netlify.com/t/how-will-i-fix-build-command-failed-error-for-my-express-application-while-publishing-on-netlify/22683 "2020-09-16T07:27:03Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![yasemincirt](https://avatars.discourse-cdn.com/v4/letter/y/e480ec/32.png) [@yasemincirt](https://answers.netlify.com/u/yasemincirt)\ **Post date:** [September 16, 2020, 7:27am UTC](https://answers.netlify.com/t/how-will-i-fix-build-command-failed-error-for-my-express-application-while-publishing-on-netlify/22683/1 "2020-09-16T07:27:03Z")
Hi everyone, I get an **error while publishing my express app on netlify.** The error snippets is here: ``` 10:11:01 AM: Build ready to start ``` 10:11:04 AM: build-image version: b0258b965567defc4a2d7e2f2dec2e00c8f73ad6 10:11:04 AM: build-image tag: v3.4.1 10:11:04 AM: buildbot version: 8c957a6d09a03023cea4239847cc73a9cb64eeb7 10:11:04 AM: Building without cache 10:11:04 AM: Starting to prepare the repo for build 10:11:04 AM: No cached dependencies found. Cloning fresh repo 10:11:04 AM: git clone [https://github.com/blockjoin/joedu-nodejs-app](https://github.com/blockjoin/joedu-nodejs-app) 10:11:05 AM: Preparing Git Reference refs/heads/master 10:11:07 AM: Different functions path detected, going to use the one specified in the Netlify configuration file: ‘functions’ versus ‘’ in the Netlify UI 10:11:07 AM: Starting build script 10:11:07 AM: Installing dependencies 10:11:07 AM: Python version set to 2.7 10:11:09 AM: v12.18.0 is already installed. 10:11:10 AM: Now using node v12.18.0 (npm v6.14.4) 10:11:10 AM: Started restoring cached build plugins 10:11:10 AM: Finished restoring cached build plugins 10:11:10 AM: Attempting ruby version 2.7.1, read from environment 10:11:13 AM: Using ruby version 2.7.1 10:11:13 AM: Using PHP version 5.6 10:11:13 AM: 5.2 is already installed. 10:11:13 AM: Using Swift version 5.2 10:11:13 AM: Started restoring cached node modules 10:11:13 AM: Finished restoring cached node modules 10:11:14 AM: Installing NPM modules using NPM version 6.14.4 10:11:20 AM: npm WARN deprecated mkdirp-promise@5.0.1: This package is broken and no longer maintained. ‘mkdirp’ itself supports promises now, please switch to that. 10:11:22 AM: npm WARN deprecated multicodec@0.5.7: stable api reached 10:11:22 AM: npm WARN deprecated request@2.88.2: request has been deprecated, see [https://github.com/request/request/issues/3142](https://github.com/request/request/issues/3142) 10:11:23 AM: npm WARN deprecated har-validator@5.1.5: this library is no longer supported 10:11:41 AM: \> bufferutil@4.0.1 install /opt/build/repo/node\_modules/bufferutil 10:11:41 AM: \> node-gyp-build 10:11:41 AM: \> keccak@3.0.1 install /opt/build/repo/node\_modules/keccak 10:11:41 AM: \> node-gyp-build || exit 0 10:11:41 AM: \> secp256k1@4.0.2 install /opt/build/repo/node\_modules/secp256k1 10:11:41 AM: \> node-gyp-build || exit 0 10:11:42 AM: \> utf-8-validate@5.0.2 install /opt/build/repo/node\_modules/utf-8-validate 10:11:42 AM: \> node-gyp-build 10:11:42 AM: \> web3@1.3.0 postinstall /opt/build/repo/node\_modules/web3 10:11:42 AM: \> node angular-patch.js 10:11:43 AM: npm WARN Joedu\_W3@1.0.0 No repository field. 10:11:43 AM: npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.13 (node\_modules/watchpack-chokidar2/node\_modules/fsevents): 10:11:43 AM: npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.13: wanted {“os”:“darwin”,“arch”:“any”} (current: {“os”:“linux”,“arch”:“x64”}) 10:11:43 AM: npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@2.1.3 (node\_modules/fsevents): 10:11:43 AM: npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@2.1.3: wanted {“os”:“darwin”,“arch”:“any”} (current: {“os”:“linux”,“arch”:“x64”}) 10:11:43 AM: added 823 packages from 573 contributors and audited 828 packages in 28.651s 10:11:44 AM: 26 packages are looking for funding 10:11:44 AM: run `npm fund` for details 10:11:44 AM: found 1 low severity vulnerability 10:11:44 AM: run `npm audit fix` to fix them, or `npm audit` for details 10:11:45 AM: NPM modules installed 10:11:45 AM: Started restoring cached go cache 10:11:45 AM: Finished restoring cached go cache 10:11:46 AM: go version go1.14.4 linux/amd64 10:11:46 AM: go version go1.14.4 linux/amd64 10:11:46 AM: Installing missing commands 10:11:46 AM: Verify run directory 10:11:48 AM: ​ 10:11:48 AM: ┌─────────────────────────────┐ 10:11:48 AM: │ Netlify Build │ 10:11:48 AM: └─────────────────────────────┘ 10:11:48 AM: ​ 10:11:48 AM: ❯ Version 10:11:48 AM: @netlify/build 3.3.5 10:11:48 AM: ​ 10:11:48 AM: ❯ Flags 10:11:48 AM: deployId: 5f61ba85d6bec462759d7f17 10:11:48 AM: mode: buildbot 10:11:48 AM: ​ 10:11:48 AM: ❯ Current directory 10:11:48 AM: /opt/build/repo 10:11:48 AM: ​ 10:11:48 AM: ❯ Config file 10:11:48 AM: /opt/build/repo/netlify.toml 10:11:48 AM: ​ 10:11:48 AM: ❯ Context 10:11:48 AM: production 10:11:50 AM: ​ 10:11:50 AM: ┌────────────────────────────────────┐ 10:11:50 AM: │ 1. build.command from netlify.toml │ 10:11:50 AM: └────────────────────────────────────┘ 10:11:50 AM: ​ 10:11:50 AM: $ CI= npm run build 10:11:50 AM: \> Joedu\_W3@1.0.0 build /opt/build/repo 10:11:50 AM: \> netlify-lambda build src 10:11:51 AM: netlify-lambda: Building functions 10:11:55 AM: ModuleNotFoundError: Module not found: Error: Can’t resolve ‘electron’ in ‘/opt/build/repo/node\_modules/swarm-js/node\_modules/got’ at /opt/build/repo/node\_modules/webpack/lib/Compilation.js:925:10 10:11:55 AM: at /opt/build/repo/node\_modules/webpack/lib/NormalModuleFactory.js:401:22 10:11:55 AM: at /opt/build/repo/node\_modules/webpack/lib/NormalModuleFactory.js:130:21 10:11:55 AM: at /opt/build/repo/node\_modules/webpack/lib/NormalModuleFactory.js:224:22 10:11:55 AM: at /opt/build/repo/node\_modules/neo-async/async.js:2830:7 10:11:55 AM: at /opt/build/repo/node\_modules/neo-async/async.js:6877:13 10:11:55 AM: at /opt/build/repo/node\_modules/webpack/lib/NormalModuleFactory.js:214:25 10:11:55 AM: at /opt/build/repo/node\_modules/enhanced-resolve/lib/Resolver.js:213:14 10:11:55 AM: at /opt/build/repo/node\_modules/enhanced-resolve/lib/Resolver.js:285:5 10:11:55 AM: at eval (eval at create (/opt/build/repo/node\_modules/tapable/lib/HookCodeFactory.js:33:10), :13:1) 10:11:55 AM: at /opt/build/repo/node\_modules/enhanced-resolve/lib/UnsafeCachePlugin.js:44:7 10:11:55 AM: at /opt/build/repo/node\_modules/enhanced-resolve/lib/Resolver.js:285:5 10:11:55 AM: at eval (eval at create (/opt/build/repo/node\_modules/tapable/lib/HookCodeFactory.js:33:10), :13:1) 10:11:55 AM: at /opt/build/repo/node\_modules/enhanced-resolve/lib/Resolver.js:285:5 10:11:55 AM: at eval (eval at create (/opt/build/repo/node\_modules/tapable/lib/HookCodeFactory.js:33:10), :25:1) 10:11:55 AM: at /opt/build/repo/node\_modules/enhanced-resolve/lib/DescriptionFilePlugin.js:67:43 10:11:55 AM: resolve ‘electron’ in ‘/opt/build/repo/node\_modules/swarm-js/node\_modules/got’ 10:11:55 AM: Parsed request is a module 10:11:55 AM: using description file: /opt/build/repo/node\_modules/swarm-js/node\_modules/got/package.json (relative path: .) 10:11:55 AM: resolve as module 10:11:55 AM: /opt/build/repo/node\_modules/swarm-js/node\_modules/got/node\_modules doesn’t exist or is not a directory /opt/build/repo/node\_modules/swarm-js/node\_modules/node\_modules doesn’t exist or is not a directory /opt/build/repo/node\_modules/node\_modules doesn’t exist or is not a directory /opt/build/node\_modules doesn’t exist or is not a directory /opt/node\_modules doesn’t exist or is not a directory /node\_modules doesn’t exist or is not a directory looking for modules in /opt/build/repo/node\_modules/swarm-js/node\_modules 10:11:55 AM: using description file: /opt/build/repo/node\_modules/swarm-js/package.json (relative path: ./node\_modules) 10:11:55 AM: using description file: /opt/build/repo/node\_modules/swarm-js/package.json (relative path: ./node\_modules/electron) 10:11:55 AM: no extension 10:11:55 AM: /opt/build/repo/node\_modules/swarm-js/node\_modules/electron doesn’t exist looking for modules in /opt/build/repo/node\_modules 10:11:55 AM: using description file: /opt/build/repo/package.json (relative path: ./node\_modules) 10:11:55 AM: using description file: /opt/build/repo/package.json (relative path: ./node\_modules/electron) 10:11:55 AM: no extension 10:11:55 AM: /opt/build/repo/node\_modules/electron doesn’t exist .wasm 10:11:55 AM: /opt/build/repo/node\_modules/swarm-js/node\_modules/electron.wasm doesn’t exist .wasm 10:11:55 AM: /opt/build/repo/node\_modules/electron.wasm doesn’t exist .mjs 10:11:55 AM: /opt/build/repo/node\_modules/swarm-js/node\_modules/electron.mjs doesn’t exist .mjs 10:11:55 AM: /opt/build/repo/node\_modules/electron.mjs doesn’t exist .js 10:11:55 AM: /opt/build/repo/node\_modules/swarm-js/node\_modules/electron.js doesn’t exist .js 10:11:55 AM: /opt/build/repo/node\_modules/electron.js doesn’t exist .json 10:11:55 AM: /opt/build/repo/node\_modules/swarm-js/node\_modules/electron.json doesn’t exist .json 10:11:55 AM: /opt/build/repo/node\_modules/electron.json doesn’t exist .ts 10:11:55 AM: /opt/build/repo/node\_modules/swarm-js/node\_modules/electron.ts doesn’t exist .ts 10:11:55 AM: /opt/build/repo/node\_modules/electron.ts doesn’t exist as directory 10:11:55 AM: /opt/build/repo/node\_modules/swarm-js/node\_modules/electron doesn’t exist as directory 10:11:55 AM: /opt/build/repo/node\_modules/electron doesn’t exist npm ERR! code ELIFECYCLE 10:11:55 AM: npm ERR! errno 1 10:11:55 AM: npm ERR! Joedu\_W3@1.0.0 build: `netlify-lambda build src` 10:11:55 AM: npm ERR! Exit status 1 10:11:55 AM: npm ERR! 10:11:55 AM: npm ERR! Failed at the Joedu\_W3@1.0.0 build script. 10:11:55 AM: npm ERR! This is probably not a problem with npm. There is likely additional logging output above. 10:11:55 AM: npm ERR! A complete log of this run can be found in: 10:11:55 AM: npm ERR! /opt/buildhome/.npm/\_logs/2020-09-16T07\_11\_55\_240Z-debug.log 10:11:55 AM: ​ 10:11:55 AM: ┌─────────────────────────────┐ 10:11:55 AM: │ “build.command” failed │ 10:11:55 AM: └─────────────────────────────┘ 10:11:55 AM: ​ 10:11:55 AM: Error message 10:11:55 AM: Command failed with exit code 1: CI= npm run build 10:11:55 AM: ​ 10:11:55 AM: Error location 10:11:55 AM: In build.command from netlify.toml: 10:11:55 AM: CI= npm run build 10:11:55 AM: ​ 10:11:55 AM: Resolved config 10:11:55 AM: build: 10:11:55 AM: command: CI= npm run build 10:11:55 AM: commandOrigin: config 10:11:55 AM: functions: /opt/build/repo/functions 10:11:55 AM: publish: /opt/build/repo/dist 10:11:55 AM: Caching artifacts 10:11:55 AM: Started saving node modules 10:11:55 AM: Finished saving node modules 10:11:55 AM: Started saving build plugins 10:11:55 AM: Finished saving build plugins 10:11:55 AM: Started saving pip cache 10:11:55 AM: Finished saving pip cache 10:11:55 AM: Started saving emacs cask dependencies 10:11:55 AM: Finished saving emacs cask dependencies 10:11:55 AM: Started saving maven dependencies 10:11:55 AM: Finished saving maven dependencies 10:11:55 AM: Started saving boot dependencies 10:11:55 AM: Finished saving boot dependencies 10:11:55 AM: Started saving go dependencies 10:11:55 AM: Finished saving go dependencies 10:11:59 AM: Error running command: Build script returned non-zero exit code: 1 10:11:59 AM: Failing build: Failed to build site 10:11:59 AM: Failed during stage ‘building site’: Build script returned non-zero exit code: 1 10:11:59 AM: Finished processing build request in 55.11118327s I set the **Build command** as` CI= npm run build` but i get this error again. how can i fix this? thank you, ---
**Author:** ![Dennis](https://sea1.discourse-cdn.com/netlify/user_avatar/answers.netlify.com/dennis/32/34_2.png) [@Dennis](https://answers.netlify.com/u/Dennis)\ **Post date:** [September 21, 2020, 3:05pm UTC](https://answers.netlify.com/t/how-will-i-fix-build-command-failed-error-for-my-express-application-while-publishing-on-netlify/22683/2 "2020-09-21T15:05:47Z")
> [@yasemincirt](#): > > 10:11:55 AM: ModuleNotFoundError: Module not found: Error: Can’t resolve ‘electron’ in ‘/opt/build/repo/node\_modules/swarm-js/node\_modules/got’ Hi @yasemincirt, I don’t think that the issue is the CI env var, as the thing that is causing your build to fail is not a warning but the error I quoted above. You’ll want to resolve why your build is trying to use electron which won’t work on our system since that’s meant for the desktop and not the web. Hope that helps.